Multiscale Renormalization and Decoupling
Christopher Ford
Abstract
The standard MS renormalization prescription is inadequate for dealing with multiscale problems. To illustrate this, we consider the computation of the effective potential in the Higgs-Yukawa model. It is argued that the most natural way to deal with this problem is to introduce a 2-scale renormalization group. We review various ways of implementing this idea and consider to what extent they fit in with the notion of heavy particle decoupling.
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